Knotter for binding mowers and straw binders



Patented My 3, 1928.

I a j 1,676,177

UNITED: STATES PATENT oFFics f AUGUST CLAAS, or HARSEWINKEL, GERMANYQKNOT'I'ER non BINDING ivrownns AND STRAW nrnnnns."

Application filed September 15, 1924, Serial Nb. 737,802, and inGermanyiseptember 20, 1923. f

The hitherto known knotters for bindingmowers and straw-binders comprisea stationarybase member and a movable tongue engaging with its front endin said base '5'member. .Said knotters have the drawback that they areadapted for knot-ting binding cord-s of a positive thickness only. Witha too thick cord, the tongue does not liberate the knot as it. is toofirmly pressed against the base member by the binding; and with a toothin cord, the tongue is not capable of holding the binding-cord as thelatter slips through base member andtongue.

Said drawbacks are overcome by the subject matter of the presentinvention, in which play with reference to the upper member.

The accompanying drawing shows in Figs.

1 and 2 sectional side views at right angles to one another of theimproved device.

The device comprises a stationary base 'member a integral with theknotter footb while an upper'member 0 is pi'votally arranged at e in thecup (Z of the knotter of which said base member forms the bottom part.The downward movement of said upper member c is limited by an abutment 7bearing against the top edge of the base member a.

i 40 lVithin the upper member 0 a tongue 9 is located and. also pivotedat e .and adapted to engage with its hooked front end i-in a recess h ofthe base member a, while it-can be operated by hand with the aid of animplement (rod or the like) inserted in its hollow upwardly directedrear end. Said tongue has'in the upper member 0, when the latter bearswith its abutment f against the top edge of the base member a, still afree play of movement in downward direction, so that binding-cord theslipping of the knot and the knotting itself are ensured.

By the binding mechanism the binding cord is wound around the sheaf and,laid around the upper and base members ofthe' knotter, which then tiesthe knot, this-being I already known in the art. "However, the

opening of the tongue 9 results in a simultaneous opening of the uppermemberc.

so the hookcan engage more or, less deeply in the recess h, whereby alsowith a thick Upon the binding-cord being passed between I base member aand tongue 9, the latter is,

for clamping thecord, again closed, the upper member c belng closedsimultaneously until its abutment f strikes upon the base member a,whereas the tongue 9 has still a free a play of movement by itsfronthook 2' en- I gaging in the recess h of the base member. a, whereby itclamps the binding-cord, whether thin Or thick, so that in any case ther finished knot must slip off.

What I claim, is

In a knotter for binding-mowers and if I straw-b1nders, i thecombination with the,

knotter foot, of a cup at the lower end of the latter, a stationary basemember having a recessed front end and integral with said a 1 knotterfoot and forming the bottom part of said cup, an upper member pivotallymounted -in said cup, an abutment on said upper member limiting thedownward movement thereof, a hand-operated tongue pivotally mountedwithin and on thesame pivot as said upper member and adapted to beopened together with'the latter but having still a free play of movementin downward direction when said upper member is stopped in its downwardmovement by 1 said.

abutment, and a hook at the. front end of said tongue adapted to engagemore-or less deeply in the recessed front end-of said base member duringth downwarm0vement of sald tongue. H

" In testimony whereof I h'ave hereunto set my hand. 1 AUGUST CLAAS.

